Upgrade for your Speed 400 applications Excellent motor for small airplanes between 12 oz 26 oz (340 g 740 g) Adapter plate included for mounting to GWS and E-flite style gearboxes Prop adapter and gold-plated connectors included Slotless 2-pole designType: BrushlessSize: Park 400Bearings or Bushings: BearingsRecommended Prop Range: 10×47 to 12x6RPM/Volt (Kv): 4200 KvResistance (Ri): .24 ohmsIdle Current (Io): 1.8A @ 10VShaft Diameter: 2mm (.08 in)Weight: 68 g (2.4 oz)Diameter: 20 mm (.8 in)Length: 40 mm (1.6 in)Continuous Current: 18AMaximum Burst Current: 24ASpeed Control: 20 – 25 Amp BrushlessGet better and more efficient performance from your sport and aerobatic park flyers with E-flite’s Park 400 brushless motor. Once you experience the enhanced power of the Park 400 you’ll soon realize it’s a jump up from Speed 400 applications.